Galway weather in May 2025

Expect 15°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Galway in May. Check more long-term weather averages for Galway in May before you book your next holiday to Ireland in 2025/2026.

  • 15°C maximum daytime temperature in May in Galway15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 18 days with some rainfall in May in Galway18
    18 days with some rainfall
  • 7°C minimum night-time temperature in May in Galway7
    7°C min night temperature
  • 16 hours of daylight per day in May in Galway16
    16 hours of daylight per day
  • No heat & humidity in May in Galway0
    No heat & humidity
  • 71 mm monthly rainfall in May in Galway71
    71 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Galway5
    5 (Moderate) UV index
  • 11°C sea temperature in May in Galway11
    11°C sea temperature

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Recommended for Ireland

  • Save on holidays to destinations across Europe in 2024/2025
  • Destinations include to France, Spain, Norway, Russia & Cyprus
  • Enjoy an escorted tour, city break, river cruise & more

The May weather guide for Ireland (Galway) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Ireland

How warm is it in Galway in May?

Daytime temperatures usually reach 15°C in Galway in May, falling to 7°C at night.

How sunny is it in Galway in May?

There are normally 6 hours of bright sunshine each day in Galway in May - that's 35% of daylight hours.

Is the sea cold around Galway in May?

The average sea temperature around Galway in May is 11°C.

Does it rain in Galway in May?

There are usually 18 days with some rain in Galway in May and the average monthly rainfall is 71mm.

Galway May sunrise & sunset times

Browse the sunrise and sunset times for Galway in May 2025. Select a month to view Galway sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:02 20:06
Friday, 16th May 2025 04:35 20:31
Saturday, 31st May 2025 04:16 20:53

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